Coordinated post-contingency dispatch of integrated energy system with multiple participants based on distributed energy trading

Abstract

The electrical, natural gas and heating subsystems of an integrated energy system (IES) can be managed by multiple independent energy operators (participants), individually. In the face of contingency events, it is essential to coordinate these participants, who pursue their own profits, in order to optimize the post-contingency dispatch of the IES and reduce the system loss. Therefore, this paper proposes a novel coordinated post-contingency dispatch scheme for the IES with multiple participants. Firstly, an emergency energy market framework of the IES is developed based on a distributed energy trading mechanism, to coordinate the energy allocation among different participants during contingencies. Then, the post-contingency dispatch model of the IES is formulated to maximize the total social welfare of the IES during contingencies. Moreover, a distributed optimization algorithm for the IES is developed based on the alternating direction method of multipliers (ADMM) with self-adaptive penalty parameters, which provides the optimal emergency energy prices to effectively coordinate the decision-making process of participants. Finally, through case studies, the proposed method is compared to the traditional centralized dispatch method and decentralized method based on regulated energy prices to demonstrate the effectiveness of the proposed method.